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A181631 as a simple table

na(n)
11
21
32
41
52
63
71
81
92
103
114
121
131
141
152
162
173
184
195
201
211
221
231
241
252
262
272
283
293
304
315
326

[1,1,2,1,2,3,1,1,2,3,4,1,1,1,2,2,3,4,5,1,1,1,1,1,
 2,2,2,3,3,4,5,6]